$ repo init -u https://android.googlesource.com/platform/manifest -b android-5.1.0_r1 -g all,-notdefault,tools
$ repo sync
$ cd tools/swt/chimpchat
$ gradle tasks
...
A problem occurred evaluating root project 'chimpchat'.
> No such property: archivesBaseName for class: org.gradle.api.internal.project.DefaultProject_Decorated
$ cd ..
$ gradle tasks
...
A problem occurred evaluating root project 'swt'.
> Plugin with id 'sdk-files' not found.
$ cd ../base/ddmlib
$ gradle tasks
A problem occurred evaluating root project 'ddmlib'.> Plugin with id 'sdk-java-lib' not found.